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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab2f21d68ef31f6cc7ec20ff12b4852c6dce0df23735df0161ebd4aaea47e0da' 
  AND token = 'Twk8SdU6DetjtYcrBywPosurbKYVWT3hw1Tlo3WA/Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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