Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd0e7343f60da1e01d9499bf5a937e91bca1b26ece457e66454602d6490c474f' 
  AND token = 'c7MytipYVa9oryMrk9e4/uehr6Or1fjeNOEgHwvl4FU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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