Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdd035f0870391b8655ac0105a3bc525d3d0f252762392687d723b02e96dd1cf' 
  AND token = 'sK4mn/gRL9XspFeqGEpsYPwcQaEN9uSCbdS90ECR1rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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