SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c13731b8c54843a74c5f57ab5a26e70604841d9982e46cad79e79cc24c3cbfac' 
  AND token = 'JAnG2LWsioZtmA3oL82KBJYI2KZhVum9iBPUGLaF8vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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