Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78d199219cb2c227aa6f845f56d06c800e8c2740921300d2c1d6bcd9e06b0555' 
  AND token = 'O9w/uCwu9DcgTs7JhJ5Ug+7wIm/Mst/gom46F0Yrrds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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