Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fbd732755ee66a4dd1117aca45dbd7878317fa2dcf00f75261df55f07f0d5d8d' 
  AND token = 'ebaXW6AcJ5DTQJ7D+M8OZFf/IKwZ7VC93Je54XPjtGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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