Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a8cdde2791be2ab32c651a941bbcbbd58ea339c5dc560bfbf3d5667efb158ce' 
  AND token = '5PN31XjiZL1fkpWE8/Z1BP4GlZH1nDq4/gXUWzp9HwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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