Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1ca2eeed7b8420f0f32b1d2acdf5a8f7ff91dd785d99f018249ec9ee1904d494' 
  AND token = 'QNvq7b+wnK3qreI72XDtNjSpLcnTwEhDQ8RWCnHwyUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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