Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41a0fdf983331de35f3d5feb073c6490716a29142439ffdd93fa6d1d9b3937a7' 
  AND token = 'm0ih1tbSUkmyulmeUCJ8cLPXyhTtdttn3LUPVbcuDsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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