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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0af291bebc47f880f63cef4b39d1aa40cd3939e5888fcaf80fcf0348bd5831fc' 
  AND token = 'TMP6ZtgjQweDu0F3q7/bfhMjOe75OuNeKSWC5FSbUws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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