Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b6f6956c333a8c231ec846c9649d476ad824620a867eb28512e7d0ed33158b' 
  AND token = 'vMmrYkM8CEi55s1yWCobxYUEB872bGJTziOamaFluGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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