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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6d8f006d0f0f161d0122fc8de0f002095e4f86efa5f4866c329bf6a098578237' 
  AND token = 'dcz5msV1i5JaUApBn5ODrAjUv7TQhzx3T8g3B3aC7x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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