Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '453658bf1756e5df9912591cf13bf9f807b00d03c4eb40508250e857205ab92f' 
  AND token = 'qs2BLohy0KHI+Id0I4cOICoY3NhcNn8KadlXuagaB5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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