Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd86b795a46bc6c9f833143c004dc4dc582e24d32cb75504c2072f8adb49c95b2' 
  AND token = 'iBteiFrstTTsWZFKBb7HCfJAw6wv4oP3p7NlhGGJ6d8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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