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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58eae5eb36e7bb2e25b9727cf0c29b6b1b6298aacb76c7e69ad8946e7fa11cc7' 
  AND token = 'qlzIwOmxsfgI9xKx7aop20YiUGmZUz+mH+J+tuQBbkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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