Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a7af250b8b69d3485f01647d85a248ea4a867b875b398589c998cf9829b35ff' 
  AND token = 'ydM7L85fbVx4Err8oHJQZCyGu/E5bYg8Yu86/17sVrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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