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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '141fdbac8500490fb8f750c24902e3c512a4a548eff791351103a9f4a8d49fa9' 
  AND token = 'PEzFSLmKFSOyWj+jYTRt8v+m4Bi4C1jyNaYYtsv4m9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}