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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7172e3eb0269d2c400eedce78c7e0c87eddd6a3cfa7657ca883443b15359b533' 
  AND token = 'wxE0JI+clcRNB1xWrYXeRH6Aakr7eXSsUHk3wKZHONA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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