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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1380ff0c0e979db64cfa8386b16940ab5ec753edee6d05b6c51b502f7e993c9' 
  AND token = 'HHCdValeQF6cZuJkAWxn3LnvWU0g+kHPEjtfoPXZt8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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