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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bd72adb7f0ec29e2eb70ba78664dc74f4faa03121841ebf4a402740fb6456d4d' 
  AND token = 'AJWkvHOUKzqA7TsRlXQ/RYwQ72duq/Y2cN8iUogsF7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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