Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e59df7471882ddc5850a4c84895c41d57712bbd000c9a3cf42fc9cf3c9c967' 
  AND token = 'VdbY2BCUTj3Hzx3fD4Ek28hFYp7iDpyXfb1Mp9139PY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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