Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7373da7eb62254261b6b4e6fbe9a4249e045063946c74b488ecc6814d2429756' 
  AND token = 'f+JPqAV7NDhn5OZji88kO7hrnnCldQeitlK82oJ5foE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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