Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6827c7f118c89f37f52dea4a74dd7bdf6a2dcc41e71ea8f13aba47d2042b14e4' 
  AND token = 'iUH4fi8C5oCyui73mRMA3ilH3sfUO4+lW144JlRXxR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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