Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acae2035e22d63dca436cf48faa7b33ea49f6e41404622010df90bdb9ad7888d' 
  AND token = '9A8ljiPGKTwaxL3pI6oXrqmjQ8G+Iua1QEBXfUlyF+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}