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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '79128f9cf4c539b794072405685af558e01c5442716b83a36552fa03c9f817a7' 
  AND token = 'mx1WNJaP9Zxpn0NQTE/Q3N+fG97CdpKa7GNCtbsfteM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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