Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70a1de489be3591cf46ed6db83375a21d99c7662a938a4c1b8ea263855cb6435' 
  AND token = 'C4eWaiTKMVHkFsktX/6QXPQbieiXXw9aUWKQjozC3FY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}