Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7733595241ee4846d42ee2a3b1bb58860bf60b87797d34700759ef31f400391' 
  AND token = 'gpqtPEMCgC9ldbPGKrzDGNV2kQpI+cp1CILboNNeMmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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