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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24c49f4f3e6faaa6c0564144b9fd787f006999fdaac4aacab6026f3d8dbf1f9b' 
  AND token = 'gwT2b3IEQRO/iOKiuye5RewZzui1vPKjQ8aDpVV24tU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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