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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aef0170c16ccb5823cee2c0dc86095d80c8229a22e8b1c0832db2bcacf05cc19' 
  AND token = 'h+/7MUqUrmM1XS4QFlrRVg230KxBrQDpIujBYFxvquo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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