Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7f84dab3197415c4fc553006d10a2140b26758b23035bb82aedd5328136c3b7' 
  AND token = 'xesfl20VH+Bi9zfFm8xxqdEoAlLAu7Pa1i0Ah3qVwFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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