Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba60be2451b942284f6712481d554624f3b2161c73e855fddf52d60c8208ccb3' 
  AND token = 'ca9aDkO5yF9KQWk7xCZFoBKo5rfVTrVGBTqYZzF4VcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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