Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8f4c55ddf2497c5dc9f7aae8f163061a87034701158a25909a0f217bcad4e48' 
  AND token = 'bHN/3Jbd6nsFGQ0WKOE2R9/9w1bYvgmGjkJJGdDb0ak=' 
  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"
    }
  }
}