Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5da4ff25611018b2b5ee418c022702276fdd08d45041ff5ccefe4ff96028a41f' 
  AND token = 'TijXa7TcdC5I+IeRyu4Pv9yxyM+vEoNfwhI2xE1Rfik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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