Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f630fe7b8876957dc784123ed20e8ba3a05954390dae95603961e0da862bc2b6' 
  AND token = 'QwFbdyle8njkTo0obK8AyvA4CY+8ebSalBQJMTdAOs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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