Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0fd33c895078ebc8b2c3d3205abc9d7366b94d7f491ac50ecacaff907c4c302' 
  AND token = 'b1+IFt7ZdN32HOJBIQpa2M3pPTv+M8VA+efDxaW6sIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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