Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f500e64e1065042ecf8f4a5ee0b80aeb7a26103f308e1a3115925692153c84ed' 
  AND token = 'XR0gKYYmlINvgak9Uy4/QqamyG+42zax3f1+ZRPOF6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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