Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc66466598905b95c07e095a7483b64c399c6a87583eb71d936bbcd4c2ce0a12' 
  AND token = 'XoRFekNhB2CU202B/fmE+efIc14mQgB8AF1ZHQvR/hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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