Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd696bb7d092a97f267ba4900db36addb492a22ea631aa8397e59fab33b4cce59' 
  AND token = 'Ugnu91qKDvPu4XxogbRt8Bot7RezLSQZXnp2PYxAoE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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