SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cee934354461e7c1297e5ffa7eaaee4d16f875e81b2902176061e1635875892' 
  AND token = 'DM1vR2CBUw3Y/8XwZ9NOMKefJpR2jtQ+80bpIRsJFVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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