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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f59e62e40002a5695f3cf4a76143c39e42389e21df72cd22c43b322ba91702f' 
  AND token = 'esSwgOZw2zT3rQi0kVfsfLhwELaFHeg1gX6sgnEWxAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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