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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb60e6ac81337a1303e1ce12287e4e85aaa50944266fee076d5fa231e1a7b2fb' 
  AND token = 'HbBu86Ga4ZdnRhEUn8BYiuszsIUGOlcvr8u2DCXODfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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