Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af38f03565050b210840dd1d783bcee38434e06c152aca64ae1c1d1d806cc5fa' 
  AND token = '5MTjeHA/CtDKFYN2H//sisDX5TuhD/YY8khrqczzE6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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