Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a8c340d6ac7d53a5caad589848c8a09af4b36a95a6bfc140b08d3d82e633a92' 
  AND token = 'ijGyQiJKZJbcXued1JxLGw6M2iVpXfqB5SbPAt6ryV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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