Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df7be03a5d29116b068f8a1e1bc49828556e6a31abac3a0836c572b1c822ac75' 
  AND token = 'HzjJq9PNVjWVKCSpAFCghmn91cSnHtukdpdJVIDT9kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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