Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb6047943f9982c07a2acfd12a3dcf4fd24aefbcad62209f3fb3a7ae3b062a92' 
  AND token = 'ZI/TzVpV4t1q98eTgqETB+ZOtaI/9T/KGW7+8I+4qqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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