SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5aa25e55091af1eedbc5f2316dcd87bfbd185498fc5af03604d82be5d877710b' 
  AND token = 'xqjYnBLzxADcqZAk0vF+1WT5kg+6onrua0NilYAXaJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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