Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ade9f1064a9abbc258abd52c5abf0eb8c771cdce161aaad22ec0a7dc416d1c3e' 
  AND token = '7L6CjLbgZ+VICQhYzRqoY8pcfW/65trXYkovKFk6PHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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