Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc809bd32e507640f2bb4e5c4598d0192b5ef1284b1162e8cec68c34b0397d97' 
  AND token = '649c6AyRcYA+vnx1fwspvi3evlsiYhraqIFLqgb27BI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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