Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d8f6eb90fc329d295c95dd65a4e544790bfc87fe134914a07d27e6c4cf181a0' 
  AND token = 'v8qvm4Lr2oo/lJtQGOXFMvsnW7wG/o5JkL2d3UO/9nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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