Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11cb0305b421036f51ce660162754cc9f7b298fa2641ef5ba4e40fe0333e4720' 
  AND token = 'QQyp2s3YBXyAK/pCwoZQZXO6dneDX6jxfCSJpx6A9HE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}