Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '046f798b1e26bdfb2a60ddddd8f7ae4b2e8821e990c03b93ea1abeb6f64a4678' 
  AND token = '2jRHqj8ceahlBcnYA9N/t652N4LDcoS+GNQJYV9tK9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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