Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da9413e1d5b5b1ad287cc82175bae421522127a332d3d17c425c9a4f2eb16145' 
  AND token = 'kMUihc8Dl4jm446LIPAMzmGgbNRPaG+kTmccRRfuxg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}