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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '54dd85f97ec6fb8149b20a4434fe90b7f5782f885e4365f56e24d0b27c50dd84' 
  AND token = '2VtPT5mh9FR0TjS7VKW/3dt56I8YMPspwYyIgOaGiFk=' 
  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"
    }
  }
}