Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2549090adf72d55971d485533cfc3927870a97e675dba317b86b6af97865a2d3' 
  AND token = 'LlOQOr/x7fEVrTebVIqKiiVns4bLNDjQS3z3Qi/QZQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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