Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49956da2c515895d9fe9c14e50744ee848dbd7b1fdeac9373ec34faf8a9e6fa7' 
  AND token = 'RwV4tnsDW3wunv9/dbvqNsiH41lskil6hP5Qh2arw98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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