Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4875e3cc88c1b267928ede54a3933465ff2449e523d7e48af50d476ce0d43b3c' 
  AND token = 'vo71Ufn4NstCQdHJKP2T2LYN4bAp8MToHZQNjuRlK5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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