Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4914d4f9e06a5e26789069099c1b166d905ea0a160819c6a3492fb8379ebf6f7' 
  AND token = '8jMb5ySqMXyTXKLvrODle7U2XO55tm8HFnp6s9+ruHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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