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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '934e792baeac677c7653347adfe843dc7b444c38b13eee5942215b4c3665cec2' 
  AND token = '3RmtpZnZFtLxubaTlV2mcirW6QJxOtFWbYiU9YPsYXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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