SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8232a89692923589b1cae9fbb98773cd09d5be8d539a4b4d0ef94d654f910728' 
  AND token = 'aRoW2yTq5hzo83wY0GMBEUK24H+HFtdgJ6FTR+K3LRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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