Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a74e5c60e4c949fb66e649df6160b5f6ed5e5c47cc2b71d8f43c7e24c81304a3' 
  AND token = 'I4bL6wzr30P6+Db0cAWwGhzcnlarTItdSRtVuBYTVGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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