Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42f1b6be952616acc072a63835e4e98adfb7327cc35a6e268c9c3914e35e1947' 
  AND token = 'yxpbPy+avy24KZhzdTfYx6v3woPJkdXXUoH/QEUaflc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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