Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da7fceac02fb128de2b808165721f473f531b862b0f352cf3011fa8150c79653' 
  AND token = 'VjCR+KyWITq0fv4zUsyjeZpaq11JOq4utwneHez5o2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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