Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f7e1d6da11259a9f1c37566d6a21fda89342f2e6d9fcfda52c6cbe54706d72d' 
  AND token = '54Ve0RgyDBG1oRRA0TGBoJOt4+GmAguk0SzggnvIqZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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