Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9dafc45b46b1d5396d7f1b776dc1a8525f556b2d4f95d3b68a93015741177ef' 
  AND token = 'scLlr6K0f1MF/09aaWKQNy8XTK95Ke0kh6ry8X2yrJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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