Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e16c883e79c3f0e9c3bf819af8b6d607b28c2e8e92a335bb4cbc524f279f3bd' 
  AND token = 'fvTMcywV26ynxMlw3Srnd6eLpmRgqVD9UWpT1qKi5GE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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