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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28fb075d4de632c62df3c5bfdc0217f107f53aa6917ab1dbc53fc4cb5a81c94f' 
  AND token = 'HPAo7Whi4hzB0nfHitDeF+BuH0yp2mwJaPIp/LGe3FU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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